{"id":"CVE-2026-115374","aliases":["DEBIAN-CVE-2026-115374","EUVD-2026-108297","GHSA-m6pj-594x-rw4f","GHSA-mmj7-8rgf-mx2h","UBUNTU-CVE-2026-115374"],"status":"published","title":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Unsigned Header Bypass in Presigned S3 Upload URLs","description":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00183,"percentile":0.08009,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-347"],"published":"2026-10-22T19:13:43Z","modified":"2026-10-28T17:50:37Z","fixes":[{"ecosystem":"Debian:14","package":"incus","fixed_in":["7.0.1-5"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:14","package":"incus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.1-5"}]}],"versions":["6.0.4-2","6.0.4-3","6.0.5-1","6.0.5-2","6.0.5-3","6.0.5-4","6.0.5-5","6.0.5-6","6.0.5-7","6.0.5-8","6.0.6-1","6.0.6-2","6.0.6-3","6.14.0-1~exp1","6.15.0-1~exp1","6.16.0-1~exp1","6.17.0-1~exp1","6.20.0-1~exp1","6.21.0-1~exp1","6.22.0-1~exp1","6.23.0-1~exp1","7.0.0-1","7.0.0-1~bpo13+1","7.0.0-2","7.0.0-2~bpo13+1","7.0.0-3","7.0.0-4","7.0.0-5","7.0.0-5~bpo13+1","7.0.1-1","7.0.1-1~bpo13+1","7.0.1-2","7.0.1-2~bpo13+1","7.0.1-3","7.0.1-3~bpo13+1","7.0.1-4","7.0.1-5~bpo13+1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"incus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4-1ubuntu1","0.5.1-1","0.5.1-3","0.6-1","6.0.0-1","6.0.0-1ubuntu0.1","6.0.0-1ubuntu0.2","6.0.0-1ubuntu0.2+esm1","6.0.0-1ubuntu0.3","6.0.0-1ubuntu0.3+esm1","6.0.0-1ubuntu0.3+esm2","6.0.0-1ubuntu0.3+esm3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"incus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.5-8","7.0.1-5"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"incus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.4-2","6.0.5-8","6.0.5-8ubuntu0.26.04.1~esm1"]}],"products":[{"vendor":"lxc","product":"incus"}],"references":[{"url":"https://github.com/lxc/incus/security/advisories/GHSA-mmj7-8rgf-mx2h","tags":["vendor-advisory","advisory","report"]},{"url":"https://www.vulncheck.com/advisories/incus-7.0.0-before-7.0.2-and-7.1.0-before-7.5.0-unsigned-header-bypass-in-presigned-s3-upload-urls","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115374","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m6pj-594x-rw4f"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115374.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-115374","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-115374","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-115374","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-115374","title":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Unsigned Header Bypass in Presigned S3 Upload URLs","description":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.","status":"published","published":"2026-10-22T19:13:43.999Z","modified":"2026-10-23T15:01:34.195Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:20:01.618694Z"}],"euvd":[{"id":"EUVD-2026-108297","description":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.","status":"published","published":"2026-10-22T19:13:43Z","modified":"2026-10-23T15:01:34Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:59:32.223152Z"}],"ghsa":[{"id":"GHSA-m6pj-594x-rw4f","title":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its...","description":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.","status":"published","published":"2026-10-22T21:32:42Z","modified":"2026-10-22T21:32:43Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:14:17.600276Z"}],"nvd":[{"id":"CVE-2026-115374","description":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.","status":"published","published":"2026-10-22T19:17:43.953Z","modified":"2026-10-23T17:06:36.03Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:13:02.724605Z"}],"osv":[{"id":"CVE-2026-115374","title":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Unsigned Header Bypass in Presigned S3 Upload URLs","description":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.","status":"published","published":"2026-10-22T19:13:43.999Z","modified":"2026-10-28T02:31:12.553916552Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:44:56.675758Z"},{"id":"DEBIAN-CVE-2026-115374","description":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.","status":"published","published":"2026-10-22T19:17:43.953Z","modified":"2026-10-24T10:00:17.825480121Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:45:50.923612Z"},{"id":"UBUNTU-CVE-2026-115374","description":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.","status":"published","published":"2026-10-22T19:17:00Z","modified":"2026-10-28T17:50:37Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","level":"high"},{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:55:59.591851Z"}]}}